Tue Dec 10 13:48:29 UTC 2024: ## Hong Kong Researchers Discover Novel Vortex Electric Field with Potential to Revolutionize Electronics

**Hong Kong, China** – Scientists from City University of Hong Kong (CityUHK) have observed a new type of vortex electric field in twisted bilayer molybdenum disulfide, a discovery with the potential to significantly enhance electronic, magnetic, and optical devices. The research, published in *Science*, details a simple yet effective method for generating this field, potentially revolutionizing fields like quantum computing and spintronics.

Previously, creating a vortex electric field required expensive and complex techniques. However, the CityUHK team, led by Professor Ly Thuc Hue, demonstrated that a simple twist in bilayer 2D materials can easily induce this field. Crucially, they developed a novel “ice-assisted transfer technique” to create clean interfaces between the bilayers, allowing precise control over the twist angle – a feat previously difficult to achieve. This technique enabled the creation of twisted bilayers with angles ranging from 0 to 60 degrees, expanding the possibilities significantly beyond previous studies limited to angles under 3 degrees.

This discovery also resulted in the creation of a 2D quasicrystal structure. Quasicrystals, known for their low heat and electrical conductivity, are highly desirable for various applications, including high-strength surface coatings. The vortex electric field generated varies depending on the twist angle, leading to a diverse range of potential applications, including:

* Enhanced memory stability in electronic devices.
* Increased computing speed and ultrafast mobility.
* Dissipationless polarization switching.
* Novel polarizable optical effects.
* Advancements in spintronics.

The team utilized four-dimensional transmission electron microscopy (4D-TEM) to analyze the material and confirm their findings. Their ice-assisted transfer technique, now patented, offers a more cost-effective and efficient alternative to existing methods for creating clean bilayer interfaces. Future research will focus on exploring the potential of stacking multiple layers and testing the technique with other materials.

Professor Ly believes this discovery could be a “major game-changer” in the development of next-generation devices, potentially impacting memory, quantum computing, spintronics, and sensing technologies. The research has opened a new avenue of exploration in twisting vortex fields within nanotechnology and quantum technology.

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